Year
| Year of measurements |
Rain0
| Pre-season rainfall |
Temp1
| Mean temperature for first growing month |
Rain1
| Rainfall for first growing month |
Temp2
| Mean temperature for second growing month |
Rain2
| Rainfall for first growing month |
Temp3
| Mean temperature for third growing month |
Rain3
| Rainfall for first growing month |
Temp4
| Mean temperature for harvest month |
Yield
| Yield of wheat in Iowa for given year |